!!! Overview
[{$pagename}] ([NID]) are used within [Uniform Resource Name] ([URN]) and are to be registered in the [IANA Registry] [Uniform Resource Names (URN) Namespaces|https://www.iana.org/assignments/urn-namespaces/urn-namespaces.xhtml|target='_blank']

[{$pagename}] is an attempt to identify different [namespace] to avoid collisions.

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]